If there aren't any packets in the capture (which could be the case if,

for example, you're doing a live capture with "Update list of packets in
real time" and none have arrived yet, or if you've read in a capture
file where there aren't actually any packets), don't look for the start
or stop time, and don't accumulate the number of captured bytes or the
number of packets that passed the display filter.

svn path=/trunk/; revision=1394

1 files changed, 24 insertions, 22 deletions

diff --git a/summary.c b/summary.c
index 68dc50a3a3..4a1951e215 100644
--- a/summary.c
+++ b/summary.c
@@ -1,7 +1,7 @@
 /* summary.c
  * Routines for capture file summary info
  *
- * $Id: summary.c,v 1.15 1999/12/10 04:20:53 gram Exp $
+ * $Id: summary.c,v 1.16 1999/12/29 21:30:28 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@zing.org>
@@ -46,15 +46,15 @@ tally_frame_data(frame_data *cur_frame, summary_tally *sum_tally)
 
   cur_time = secs_usecs(cur_frame->abs_secs, cur_frame->abs_usecs);
 
-    if (cur_time < sum_tally->start_time) {
-      sum_tally->start_time = cur_time;
-    }
-    if (cur_time > sum_tally->stop_time){
-      sum_tally->stop_time = cur_time;
-    }
-    sum_tally->bytes += cur_frame->pkt_len;
-    if (cur_frame->passed_dfilter)
-	  sum_tally->filtered_count++;
+  if (cur_time < sum_tally->start_time) {
+    sum_tally->start_time = cur_time;
+  }
+  if (cur_time > sum_tally->stop_time){
+    sum_tally->stop_time = cur_time;
+  }
+  sum_tally->bytes += cur_frame->pkt_len;
+  if (cur_frame->passed_dfilter)
+    sum_tally->filtered_count++;
 }
 
 void
@@ -65,18 +65,23 @@ summary_fill_in(summary_tally *st)
   int 		i;
   frame_data    *cur_glist;
 
- /* initialize the tally */
-  first_frame = cf.plist;
-  st->start_time = secs_usecs(first_frame->abs_secs,first_frame->abs_usecs) ;
-  st->stop_time = secs_usecs(first_frame->abs_secs,first_frame->abs_usecs) ;
+  st->start_time = 0;
+  st->stop_time = 0;
   st->bytes = 0;
   st->filtered_count = 0;
-  cur_glist = cf.plist;
 
-  for (i = 0; i < cf.count; i++) {
-    cur_frame = cur_glist;
-    tally_frame_data(cur_frame, st);
-    cur_glist = cur_glist->next;
+  /* initialize the tally */
+  if (cf.plist != NULL) {
+    first_frame = cf.plist;
+    st->start_time = secs_usecs(first_frame->abs_secs,first_frame->abs_usecs);
+    st->stop_time = secs_usecs(first_frame->abs_secs,first_frame->abs_usecs);
+    cur_glist = cf.plist;
+
+    for (i = 0; i < cf.count; i++) {
+      cur_frame = cur_glist;
+      tally_frame_data(cur_frame, st);
+      cur_glist = cur_glist->next;
+    }
   }
 
   st->filename = cf.filename;
@@ -94,7 +99,4 @@ summary_fill_in(summary_tally *st)
 #else
   st->cfilter = NULL;
 #endif
-
-
 }
-